A hand carryable apparatus comprising a first power system, a second power system, a mechanical coupling, and an electrical coupling. The first power system comprises a first enclosure, a photovoltaic panel, a first power inverter, and a first alternating current interface coupled to the first output of the first power inverter. The second power system comprises a second enclosure, a battery, a second power inverter, and a second alternating current interface coupled to the second output of the second power inverter. The mechanical coupling and the electrical coupling removably couple the first power system to the second power system. The electrical coupling is capable of passing power between the first power system and the second power system. The second power system is capable of operating independently of the first power system.